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Observation of the fastest chemical processes in the radiolysis of water
Nanyang Technol Univ, Sch Phys & Math Sci, Div Chem & Biol Chem, Singapore, Singapore.
Argonne Natl Lab, Chem Sci & Engn Div, Lemont, IL 60439 USA.
DESY, Ctr Free Electron Laser Sci, Hamburg, Germany;Univ Hamburg, Dept Phys, Hamburg, Germany;Hamburg Ctr Ultrafast Imaging, Hamburg, Germany.
Uppsala University, Disciplinary Domain of Science and Technology, Physics, Department of Physics and Astronomy, Molecular and Condensed Matter Physics. European XFEL GmbH, Schenefeld, Germany.
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2020 (English)In: Science, ISSN 0036-8075, E-ISSN 1095-9203, Vol. 367, no 6474, p. 179-182Article in journal (Refereed) Published
Abstract [en]

Elementary processes associated with ionization of liquid water provide a framework for understanding radiation-matter interactions in chemistry and biology. Although numerous studies have been conducted on the dynamics of the hydrated electron, its partner arising from ionization of liquid water, H2O+, remains elusive. We used tunable femtosecond soft x-ray pulses from an x-ray free electron laser to reveal the dynamics of the valence hole created by strong-field ionization and to track the primary proton transfer reaction giving rise to the formation of OH. The isolated resonance associated with the valence hole (H2O+/OH) enabled straightforward detection. Molecular dynamics simulations revealed that the x-ray spectra are sensitive to structural dynamics at the ionization site. We found signatures of hydrated-electron dynamics in the x-ray spectrum.

Place, publisher, year, edition, pages
AMER ASSOC ADVANCEMENT SCIENCE , 2020. Vol. 367, no 6474, p. 179-182
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Materials Chemistry
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URN: urn:nbn:se:uu:diva-406058DOI: 10.1126/science.aaz4740ISI: 000506811300036PubMedID: 31919219OAI: oai:DiVA.org:uu-406058DiVA, id: diva2:1411880
Funder
Swedish Research Council, 2018-04088EU, Horizon 2020, 681881Available from: 2020-03-04 Created: 2020-03-04 Last updated: 2020-03-04Bibliographically approved

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Kjellsson, LudvigRubensson, Jan-Erik

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